On Fri, Oct 21, 2016 at 11:42 AM, <m.roth@xxxxxxxxx> wrote:
> Larry Martell wrote:
>> On Fri, Oct 21, 2016 at 11:21 AM, <m.roth@xxxxxxxxx> wrote:
>>> Larry Martell wrote:
>>>> We have 1 system ruining Centos7 that is the NFS server. There are 50
>>>> external machines that FTP files to this server fairly continuously.
>>>>
>>>> We have another system running Centos6 that mounts the partition the
>>>> files
>>>> are FTP-ed to using NFS.
>>> <snip>
>>> What filesystem?
>>
>> Sorry for being dense, but I am not a sys admin, I am programmer and
>> we have no sys admin. I don't know what you mean by your question. I
>> am NFS mounting to what ever the default filesystem would be on a
>> CentOS6 system.
>
> This *is* a sysadmin issue.
I know it's a sysadmin issue. I wish we had one, but we don't and I am
the one being asked to fix things.
> Each partition is formatted as a specific type
> of filesystem. The standard Linux filesystems for Upsteam-descended have
> been ext3, then ext4, and now xfs. Tools to manipulate xfs will not work
> with extx, and vice versa.
>
> cat /etc/fstab on the systems, and see what they are. If either is xfs,
> and assuming that the systems are on UPSes, then the fstab which controls
> drive mounting on a system should have, instead of "defaults",
> nobarrier,inode64.
>
> Note that the inode64 is relevant if the filesystem is > 2TB.
>
> The reason I say this is that we we started rolling out CentOS 7, we tried
> to put one of our user's home directory on one, and it was a disaster.
> 100% repeatedly, untarring a 100M tarfile onto an nfs-mounted drive took
> seven minutes, where before, it had taken 30 seconds. Timed. It took us
> months to discover that NFS 4 tries to make transactions atomic, which is
> fine if you're worrying about losing power or connectivity. If you're on a
> UPS, and hardwired, adding the nobarrier immediately brought it down to 40
> seconds or so.
I have no remote access to this system, only on site, so it will have
to wait until Monday for me to check. (The system is in Japan and I
traveled from NY to Japan, where I am now, just to fix this issue.)
Thanks for the reply.
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